CN107795055A - A kind of modular combination floor and construction method - Google Patents

Abstract

A modular composite floor slab and its construction method. The floor slab is formed by continuous splicing of square (rectangular) modular standard slabs on the same plane. The lower layer of the standard slab is a steel frame, and the top surface of the steel frame is laid with a concrete layer. The concrete layer The side edge of the steel frame is retracted 25~150mm relative to the side of the steel frame; the concrete layer and the upper surface of the steel frame are connected by shear members, and the steel frame is surrounded by channel steel on all sides to form a hollow whole. Modular standard panels of the same size are fixed and connected by bolts through adjacent steel frames to form an integral composite floor. The composite floor can be connected and fixed with building beams or columns from the side or bottom surface, and then smoothed with concrete. The invention can realize the installation of floor slabs of different shapes and sizes by splicing prefabricated modularized standard slabs on site. The floor slabs are light in weight, fast in installation, convenient in construction, and good in overall force bearing performance.

Description

A modular composite floor slab and its construction method

technical field

The invention relates to construction engineering technology, in particular to a modular composite floor for building construction and a construction method.

Background technique

The prefabricated concrete structure refers to the structure assembled on the construction site using prefabricated concrete components produced by the factory. It has the advantages of fast installation speed, less pollution to the construction site, and easy guarantee of project quality. It has broad application prospects in our country. The floor slab is a part of the prefabricated components in the prefabricated concrete structure, and its methods include prefabricated (prestressed) concrete slabs, reinforced concrete laminated slabs, etc. However, both of these two methods have defects: the former has poor integrity of the assembled floor and can only transmit force in one direction; while the latter has a low degree of standardization and there are a lot of wet operations on site.

Contents of the invention

The technical problem to be solved by the present invention is to provide a modular composite floor and its construction method. This composite floor is spliced by factory prefabricated modular standard panels, has good integrity and can realize two-way force transmission.

The present invention provides a modular composite floor, which is characterized in that: the whole floor is formed by continuous splicing of rectangular modular standard panels on the same plane, and the side length of the standard panels is 0.3-2.4m;

The lower layer of the standard slab is a steel frame, the top surface of the steel frame is laid with a concrete layer, and the side edge of the concrete layer shrinks inward by 25 ~ 150mm relative to the side of the steel frame;

The steel frame is a hollow whole surrounded by channel steel on all sides, the web of the channel steel is perpendicular to the concrete layer, the notch is inward, and the wing plate on the top surface of the channel steel is fixedly connected with the concrete layer;

In the concrete layer and parallel to the concrete layer, a reinforcement mesh is buried, and the reinforcement mesh protrudes 50-250mm from the side of the concrete layer.

Preferably, the concrete layer is provided with a plurality of connecting grooves concaved inward by 40-125mm at the side where the reinforcement mesh protrudes from the concrete layer.

Preferably, studs fixedly connected to the steel frame are provided within the area covered by the concrete layer.

The web of the channel steel is provided with bolt holes, which are used for the connection and installation of the whole floor slab to the building beam or column from the side, or the splicing between the modular standard slabs.

Bolt holes are provided on the wing plate on the bottom surface of the channel steel, which are used for connecting and installing the whole floor slab with the building beam or column from the bottom surface.

A construction method for the above-mentioned modularized composite floor, characterized in that it is carried out in accordance with the following sequence of steps:

The first step is to prefabricate standard panels in batches in the factory;

The second step is to transport the standard slab to the construction site, and splice the whole floor slab according to the design shape and size of the floor slab on the ground or in the air at the construction site. During the splicing process:

First, align the adjacent standard slabs horizontally. After the webs of the steel frame are aligned, use the connecting bolts to pass through the bolt holes of the aligned adjacent webs and fasten them. Secondly, tighten the reinforcement mesh at the adjacent positions to form a semi-finished floor slab. ;

The third step is to hoist the semi-finished floor slab to the design floor position, and fix it with the building beam or column from the side or bottom surface, then fill the groove on the surface of the floor slab with concrete slurry, and make it flush with the concrete layer, after a specified time of curing and solidified.

When the floor slab is connected to the building beam or column from the side, firstly, the steel frame web plate of the edge standard slab is fastened with screws or bolts to the side of the connecting building beam or column, and then the outer side of the concrete layer of the edge standard slab is connected to the building beam or The groove of the column is filled with concrete slurry, smoothed, and cured after a specified period of time.

When the floor slab is connected to the building beam or column from the bottom surface, firstly, at the position of the connecting building beam or column steel structure that touches the bottom of the standard slab, connect the building beam or column laterally from the inside of the bottom flange of the steel frame with screws or bolts, and then fasten the The outside of the concrete layer of the edge standard slab and the groove of the wall are filled with concrete slurry, smoothed, and cured after a specified period of time.

When the semi-finished floor slab is assembled on the ground, the semi-finished floor slab is a part of the overall floor to be installed at this position. After the semi-finished floor slab is connected to the connecting building beam or column from the side or bottom surface, a new standard slab is expanded and spliced at the vacant position , align the new standard slab steel frame with the standard slab steel frame of the semi-finished floor slab side by side, fasten it with bolts, connect the standard slab to the floor slab overlapped building connection building beam or column steel structure one by one, and connect with the building beam Or stud bolt connection, and finally fill the concrete slurry in the groove on the top surface and smooth it out, after a specified time of curing and curing.

In the first step, the batch prefabrication process of standard slabs in the factory is as follows: first prefabricate the steel frame, then weld and fix the studs within the coverage of the concrete layer of the steel frame, then install the formwork of the corresponding shape, pour concrete, and prefabricate in the concrete layer Bury the reinforcement mesh in the vertical and horizontal directions; wait for curing.

The invention realizes the factory prefabrication of the floor slab and fast splicing of bolts on site, so that the floor slab can be standardized and prefabricated. The modular structure is almost not limited by the actual shape and size on site, and can be quickly installed on site according to specific conditions.

The combined floor slab of the present invention is spliced by square (rectangular) modularized standard prefabricated panels. The lower layer of the standard slab is a steel frame, and the top surface of the steel frame is laid with a concrete layer. The concrete layer and the steel frame are connected by shear members, and the four corners of each steel frame are connected by bolts. The joints shall be poured concrete on site.

The present invention realizes the laying of modularized standard slabs for floor slabs of different plane sizes, and completes the assembly on site. It has the advantages of high standardization, good floor integrity, high bearing capacity, two-way force transmission, less wet work on site, and fast installation. good.

Description of drawings

Figure 1 is a schematic diagram of the structure of the modular composite floor,

Fig. 2 is a B-B sectional view in Fig. 1,

Fig. 3 is a sectional view of A-A in Fig. 2,

Figure 4 is a schematic diagram of the connection between the side of the floor slab and the side of the steel building beam or column,

Figure 5 is a schematic diagram of the connection between the bottom surface of the floor slab and the steel building beam or column.

In the figure: 1—concrete layer, 2—reinforcing mesh, 3—slot between plates, 4—spindle, 5—steel frame, 6—web plate, 7—bolt, 8—flange, 9—connection groove, 10— Bolt hole.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments: the floor slabs in the prior art need to be prefabricated according to the required shape or only have a single structural size to span the beams on both sides as a whole. When the building structure cannot be completely matched, install and construction are more complicated. The solution of the present invention seeks to solve this problem.

As shown in Figures 1 and 2, the modular composite floor is composed of rectangular modular standard slabs spliced continuously on the same plane. The side length of the standard slab is 0.3~2.4m. Standard slabs of different specifications can be set according to Need to choose.

The lower layer of the standard slab is a steel frame 5, and the top surface of the steel frame is laid with a concrete layer 1, and the side edges of the concrete layer are retracted 25-150mm relative to the sides of the steel frame. A reinforcement mesh 2 is buried parallel to the concrete layer in the concrete layer, and the reinforcement mesh 2 protrudes 50-250mm from the side of the concrete layer. In order to facilitate the reinforcement connection between adjacent modular standard slabs.

At the side where the reinforcement mesh protrudes from the concrete layer, the concrete layer is provided with a plurality of connecting grooves 9 concaved inward by 40-125 mm. It is also convenient to provide a larger connection space for the reinforcement connection between adjacent standard plates.

The steel frame 5 is a hollow whole surrounded by channel steel, the web 6 of the channel steel is perpendicular to the concrete layer 1, the notch is inward, and the wing plate 8 on the top surface of the channel steel is fixedly connected with the concrete layer; Be provided with the stud 4 that is fixedly connected with steel frame in the range. To enhance the connection between the steel frame and the concrete layer.

The web 6 of the channel steel is provided with a bolt hole 10, which is used for connecting and installing the whole floor slab to a building beam or column from the side or splicing between standard slabs. When the adjacent standard plates are connected, the web 6 of the channel steel is in direct contact, and the positions of the bolt holes are aligned, and the bolt 7 can be directly passed through for connection. When the standard plate is connected to the building beam or column from the side, align the embedded sleeve or connector of the building beam or column, and connect through the bolt 7.

The wing plate 8 on the bottom surface of the channel steel is provided with a bolt hole 10, which is used for connecting and installing the whole floor slab with the building beam or column from the bottom surface. When the standard plate is built on the top of the building beam or column and then connected, the sleeve or connector embedded in the building beam or column is aligned and connected by bolts.

A method for constructing the above-mentioned modular composite floor slabs is carried out in accordance with the following sequence of steps:

The first step is to prefabricate standard panels of corresponding specifications in batches in the factory;

The process of prefabricating standard slabs in batches in the factory is as follows: first prefabricate the steel frame 5, then weld and fix the studs 4 within the coverage of the concrete layer of the steel frame, install the formwork of the corresponding shape, pour concrete, and pre-embed vertical and horizontal slabs in the concrete layer. Mesh 2; waiting to cure.

The second step is to transport the standard slab to the construction site, and splice the whole floor slab according to the design shape and size of the floor slab on the ground or in the air at the construction site. During the splicing process:

First, align the adjacent standard plates horizontally. After the webs 6 of the steel frame 5 are aligned, pass the connecting bolts 7 through the bolt holes 10 of the aligned adjacent webs and fasten them. Next, tighten the reinforcement mesh 2 at the adjacent position. connection to form a semi-finished floor slab;

The third step is to hoist the semi-finished floor slab to the design floor position, and fix it with the building beam or column from the side or bottom surface, then fill the groove on the surface of the floor slab with concrete slurry, and make it flush with the concrete layer, after a specified time of curing and solidified.

When the floor slab is connected to the building beam or column from the side, firstly, the steel frame web plate of the edge standard slab is fastened with screws or bolts to the side of the connecting building beam or column, and then the outer side of the concrete layer of the edge standard slab is connected to the building beam or The groove of the column is filled with concrete slurry, smoothed, and cured after a specified period of time.

When the floor slab is connected to the building beam or column from the bottom surface, firstly, at the steel structure position of the connecting building beam or column that touches the bottom of the standard slab, connect the building beam or column from the inner side of the bottom flange of the steel frame and fasten it with screws or bolts to connect the building Beams or columns can have embedded bolt sleeves or connectors for bolted or screwed connections. Then fill the concrete slurry outside the concrete layer of the edge standard plate and the groove of the wall, smooth it, and cure it after a specified period of time.

When the semi-finished floor slab is assembled on the ground, the semi-finished floor slab is a part of the overall floor to be installed at this position. After the semi-finished floor slab is connected to the connecting building beam or column from the side or bottom surface, a new standard slab is expanded and spliced at the vacant position , align the new standard slab steel frame with the standard slab steel frame of the semi-finished floor slab side by side, fasten it with bolts, connect the standard slab to the floor slab overlapped building connection building beam or column steel structure one by one, and connect with the building beam Or stud bolt connection, and finally fill the concrete slurry in the groove on the top surface and smooth it out, after a specified time of curing and curing.

Claims (10)

1. A modular composite floor, characterized in that: the floor as a whole is formed by continuous splicing of rectangular modular standard panels on the same plane, and the side length of the standard panels is 0.3 to 2.4m; The lower layer of the standard slab is a steel frame (5), the top surface of the steel frame is laid with a concrete layer (1), and the side edge of the concrete layer shrinks inwardly by 25-150 mm relative to the side edge of the steel frame; The steel frame (5) is a hollow whole surrounded by channel steel on all sides, the web (6) of the channel steel is perpendicular to the concrete layer (1), the notch is inward, and the wing plate (8) on the top surface of the channel steel is in contact with the concrete layer (1). layer fixed connection; A reinforcement mesh (2) is buried parallel to the concrete layer in the concrete layer, and the reinforcement mesh (2) protrudes 50-250mm from the side of the concrete layer. 2. The modular composite floor slab according to claim 1, characterized in that: at the side where the reinforcement mesh protrudes from the concrete layer, the concrete layer is provided with a plurality of connecting grooves (9) concave inward by 40-125mm. 3. The modular composite floor slab according to claim 1, characterized in that: within the area covered by the concrete layer, there are pegs (4) fixedly connected with the steel frame. 4. The modular composite floor slab according to claim 1, characterized in that: the web (6) of the channel steel is provided with bolt holes (10), which are used to connect and install the whole floor slab to the building beam or column from the side or to modularize it. Splicing between standard boards. 5. The modular composite floor according to claim 1, characterized in that: the flange (8) on the bottom of the channel steel is provided with bolt holes (10), which are used to connect and install the whole floor to the building beam or column from the bottom. 6. A construction method for modular composite floor slabs according to any one of claims 1 to 5, characterized in that: the following steps are carried out in sequence: The first step is to prefabricate standard panels in batches in the factory; The second step is to transport the standard slab to the construction site, and splice the whole floor slab according to the design shape and size of the floor slab on the ground or in the air at the construction site. During the splicing process: First align the adjacent standard plates horizontally, after the webs (6) of the steel frame (5) are aligned, pass the bolt holes (10) of the aligned adjacent webs with the connecting bolts (7) and fasten them, and then place the The steel mesh (2) at the adjacent position is tightened and connected to form a semi-finished floor slab; The third step is to hoist the semi-finished floor slab to the design floor position, and fix it with the building beam or column from the side or bottom surface, then fill the groove on the surface of the floor slab with concrete slurry, and make it flush with the concrete layer, after a specified time of curing and solidified. 7. The floor construction method according to claim 6, characterized in that: when the floor is connected to the building beam or column from the side, at first, from the steel frame web of the edge standard plate to the side of the connecting building beam or column with screws or bolts Fasten, then fill the concrete slurry outside the concrete layer of the edge standard slab and the groove connecting the building beam or column, smooth it, and cure it after a specified period of time. 8. The floor construction method according to claim 6, characterized in that: when the floor is connected to the building beam or column from the bottom surface, at first, at the position of the steel structure connecting the building beam or column contacting the bottom of the standard slab, from the bottom wing of the steel frame The inside of the slab is laterally connected to the building beams or columns and fastened with screws or bolts, and then the concrete slurry is filled in the outside of the concrete layer of the edge standard slab and the groove of the wall, smoothed, and cured after a specified period of time. 9. The floor construction method according to claim 6, characterized in that: when the floor semi-finished product is assembled on the ground, the floor semi-finished product is a part of the overall floor to be installed at this position, and the floor semi-finished product is connected from the side or bottom surface After connecting the building beams or columns, expand and splice new standard slabs in the vacant position, align the new standard slab steel frame with the standard slab steel frame of the semi-finished floor slab side by side, fasten them with bolts, and connect the standard slabs to the floor slab one by one The lapped building is connected to the steel structure of the building beam or column, and is connected with the connecting building beam or column bolts. Finally, the grooves appearing on the top surface are filled with concrete slurry and smoothed, and cured after a specified period of time. 10. The floor slab construction method according to claim 6, characterized in that: in the first step, the process of prefabricating standard slabs in batches in the factory is: first prefabricating the steel frame (5), and then within the coverage of the concrete layer of the steel frame The studs (4) are welded and fixed, and then the formwork of the corresponding shape is installed, the concrete is poured, and the reinforcement mesh (2) in the vertical and horizontal directions is pre-embedded in the concrete layer; wait for curing.